Fig. 3: The mechanism of *NO adsorption configuration change. | Nature Communications

Fig. 3: The mechanism of *NO adsorption configuration change.

From: Steering the catalyst structure and intermediates adsorption configuration during pulsed nitrate electroreduction

Fig. 3

A XPS spectra of O 1s for catalysts during pulsed electrolysis at EP = 0.2 V. The measurement of the adsorbed OH or water on the vacancy sites was conducted after ~70 oxidation–reduction cycles; B EPR spectra of the catalysts after the pulsed reduction and potentiostatic reduction. C CV curves illustrating the OHad for Cu nanoparticles across various potentials during both the pulsed and potentiostatic electrolysis. D Fluorescence spectra displaying detected •OH radicals in 1 M KOH electrolyte using TPA (0.4 mM) as probe molecules. E The adsorption energy of *NO Side-on and *NO Top (ΔEads(*NO)) over the surface of both Ov-Cu2O(111)/Cu(111) and Cu(111); F the projected density of states (PDOS) of *NO on Ov-Cu2O(111)/Cu(111); G Gibbs free-energy diagrams of *NO-to-*NOH over Ov-Cu2O(111)/Cu(111) and Cu(111); H Schematic depicting the impact of pulsed strategy on changes in *NO configurations. The voltage is not iR corrected. Source data for the figure are provided as a Source data file.

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